Whiffletree-evener spring-casing



T. J. CHRISTY.

WHIEFLB-TREB EVBNBR. SPRING GASING.

(NO Model.)

N0.'336,991. Patented Mar. 2, 1886.

A ilivrrfnn STATES PATENT Ormea.

vTHOMAS J. CHRISTY, OF LEBANON, ILLINOIS.

WHlFFLETREE-EVENER SPRING-CASING.

SPECEICATION forming part of Letters Patent No. 336,991. dated March 2I1886.

Application filed November 19, 18H5. Serial No. 183,296.

To aZZ whom it may concern:

Be it known that I, THOMAS J. CHRISTY, a citizen of the United States,residing at Lebanon, in the county of St. Clair and State of Illinois,have invented certain new and useful Improvements in Whifetree-EvenerSpring- Oasings or Housings for Same, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification.

My invention relates more particularly to the manner and form ofconstructing a metallic frame or liousingin which is secured aspiralspring, so that it will be more durable and convenient in detaching'andreplacing the whiffletrees when desired to be used in doubling teams orother purposes.

The object of the device is to reduce the shock or jerk upon theshoulders of animals when engaged at work and equalize the strain.

It will be seen that when my device is secured to the pole or tongue ofa vehicle the double-tree or evener can be attached to draftblockwithout any change or expense, the difflculty of which is experienced inother forms of devices now in use.

The detail construction and advantages of my improvements will be morefully understood and explained by referring to t-he draw- Figure 1 is aperspective view of draft-block all fitted together; Fig. 2, perspectiveView of housing and plate A A, having dovetail slot E, bolt-holes D D,and housing B, which is cast in one piece ready for inserting head-blockFig. 3, perspective view of head-block,which is also cast in one piece,ready for inserting bolt M, which is made of wrought-iron, but may becast with head-block, if desired. Fig. 4 is a vertical longitudinalsection showing manner of attaching to tongue; Fig. 5, cone-section online 5 5 of Fig. 4; Fig. 6, horizontal section on line 6 6 of Fig. 4;Fig. 7, cone-section on line 7 7 of Fig. 4.

A is the housing-plate; B,housing; C, bearing for spring; D, bolt-holes;E, dovetail slot; F, tongue; G, head-block shank; H, head; I, bolt; J,convex surface; K, flaring sides; L, dovetail block; M, bolt; N, spring;O, nut; P,

(No model.)

buffer-block Q, double-tree; R, bolts.

tire length of the spring N, as shown in Fig. 4, which always keeps thespring in its true position, so that the draft and strain is in a trueand direct line forward. The convex Surface J, as shown in Fig. 6,allows the double-tree to work back and forward, so that the pressure isalways in a true and direct line. It will also be seen that the draft isnot entirely upon the bolt Las the double-tree presses forward againstthe convex surface J, and the bolt I holds the double-tree in its trueand proper place. By withdrawing the bolt I and pulling the double-treeback out of the head-block the teamster can readily detach his team withthe whiftletrees, and hitch the same to any other Vehicle, which is verydesirable in doubling up teams. When the team is drawing, the headblockH presses forward against spring N,and the shank G telescopes into thehousing B far enough to allow the spring to be entirely closed when thestrain or pressure is sufficient to do so. The dovetail block L, slidingin dovetail slot E, keeps the head-block H in a true and/ direct line ofpressure. The buffer-block P is made of rubber or other suitableinateriahand serves to take up the shock and strain caused by the eveueror double-tree Q after the compression of thespring. The nut O securesand keeps the buffer P and bolt M in their proper places., and, whendesired, is used to regulate the tension of the spring or take up slackmotion that may be caused by continued use.

My manner of constructing the head H and head-block shank G, havingflaring sides K K sliding upon plate A into housing B, always keeps thespring from being exposed to the weather and liable to become cloggedwith mud, ice, or snow and its utility destroyed.

My device is strong and durable, and is very simple and easilyconstructed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The combination of the case-plate A,hous ing B, bearing C,dovetailslot E, with the shank G, having head H, bolt M, and spring N,construeted substantially as shown and described.

It will L be seen that the bolt M 'passes through the en` 2. Thehead-block having shank G, head H, combination with the head-blockhaving the convex surface J, and inclined sides K, as spring N, boli: M,buffer-block P, and nnb O, ro shown and described. l h d arranged tooperate as shown and described.

3. The plate A, having tie ousing B an 5 dovetailed slot E, constructedsubstantially as THOMAS J CHRISTY' shown and described, for the purposesset; forth "Witnesses:

4. The plate A, constructed as shown and C. PESOLD,

' described, with housing and dovetail slot, in J AS. J. MCKEE.

